equations Flashcards
1
Q
gravitational potentail energy=
A
mass x height x gravitational field strength
2
Q
density=
A
mass ÷ volume
3
Q
electrical power=
A
potential difference x current
or
current² x resistance
4
Q
electrical energy transferred=
A
power x time
or
charge x potential difference
5
Q
charge flow=
A
current x time
6
Q
potential difference=
A
current x resistance
7
Q
kinetic energy=
A
1/2 x mass speed²
8
Q
power=
A
work done ÷ time
or
energy transferred ÷ time
9
Q
efficiency=
A
useful energy output ÷ total energy input (x100)
or
useful power output ÷ total power input (x100)
